Manuel Balce Ceneta, Associated Press
Sen. Lindsey Graham, R-S.C., speaks during a discussion hosted by the American Action Forum and the Foreign Policy Initiative about the topic "Will We Confront the Growing Security Threats?" on Capitol Hill in Washington, Thursday, March 12, 2015.

WASHINGTON — A top Republican senator says the White House faces a 'violent backlash" in Congress if a nuclear deal with Iran goes to the United Nations before Congress.

The U.S. and its partners are trying to reach a deal by the end of the month that would prevent Iran from developing nuclear weapons. In exchange, Tehran would get relief from economic sanctions, including those imposed by Congress.

Sen. Lindsey Graham of South Carolina said Monday at the Council on Foreign Relations in New York that if there is a framework deal by the end of the month, the Senate will vote in April on legislation requiring congressional review of any deal. He predicts the measure will pass in April with enough votes to override President Barack Obama's veto threat.